[Mesa-dev] [PATCH] radv: disable DCC for X4 Foundations to workaround a GPU hang

[Samuel Pitoiset]

The game apparently hangs inside a copy image operation, but
only when DCC is enabled. I haven't figured out the root cause
yet, but this workaround fixes the problem and allows people
to play that title, at least.

Cc: 18.3 19.0 <mesa-stable at lists.freedesktop.org>
Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/amd/vulkan/radv_device.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index fc04de21025..bb76885d986 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -510,6 +510,12 @@ radv_handle_per_app_options(struct radv_instance *instance,
 	} else if (!strcmp(name, "DOOM_VFR")) {
 		/* Work around a Doom VFR game bug */
 		instance->debug_flags |= RADV_DEBUG_NO_DYNAMIC_BOUNDS;
+	} else if (!strcmp(name, "X4")) {
+		/* FIXME: X4 Foundations hangs the GPU on GFX9. It seems to
+		 * work on GFX8, but I think it's safer to disable DCC
+		 * everywhere for now.
+		 */
+		instance->debug_flags |= RADV_DEBUG_NO_DCC;
 	}
 }
 
-- 
2.21.0